KR20170100992A - Viscoelastic composition for reducing floor impact sound of apartment houses having antibacterial activity and antimicrobial activity, and viscoelastic damper including the same - Google Patents

Abstract

Disclosed are a viscoelastic composition for reducing noise between floors of apartment houses, capable of damping impact vibration caused by bottom impact sources of a bottom structure while being environment-friendly and having antibacterial and antimicrobial activity, and a viscoelastic damper including the same. To this end, the viscoelastic composition for reducing noise between floors of apartment houses comprises 10 to 20 parts by weight of water, 10 to 30 parts by weight of a binder, 20 to 40 parts by weight of a first inorganic pigment, 10 to 25 parts by weight of a second inorganic pigment and 10 to 30 parts by weight of a natural antimicrobial agent. The composition has excellent vibration damping performance, and can be used as an antibacterial and antimicrobial building finishing material satisfying legal standards with respect to antibacterial and antimicrobial products.

Description

TECHNICAL FIELD [0001] The present invention relates to a viscoelastic composition for noise reduction in apartment buildings having an environmentally friendly performance, an antibacterial and antifungal efficiency, and a viscoelastic damping material containing the same, and a viscoelastic damping material containing the viscoelastic composition and the viscoelastic damping material containing the same.

[0001] The present invention relates to a viscoelastic composition for noise reduction in a building having a vibration damping characteristic and a viscoelastic damping material containing the same, and more particularly, to a viscoelastic damping material capable of attenuating impact vibrations generated by a floor impactor of a floor structure The present invention relates to a viscoelastic composition for noise reduction in a building having an environmentally friendly performance and an antibacterial and antifungal efficiency, and a viscoelastic damping material containing the same.

Since apartment buildings such as ordinary houses, apartments, business buildings, and commercial buildings are spaces where people live and perform various activities, their interior materials are improved and developed so as to satisfy the conditions that enable people to live comfortably and comfortably Is coming.

As a typical residential type, the insulation problem is generally satisfactory but the interlayer noise is not blocked in satisfying the interlayer noise isolation and insulation in the case of the apartment house, which is a great social problem.

As a result, the problem of noise isolation has emerged as a problem to be solved for modern people who live in apartment houses and need an independent and comfortable environment.

In the conventional method for preventing such interlayer noise, a lightweight foamed concrete is placed on the upper part of the slab to form a buffer material layer on the upper part of the slab of foamed synthetic rubber or polyethylene foam, After forming a foamed concrete layer, a method of applying a finish mortar in which a hot water pipe is inserted on the lightweight foamed concrete layer has been used.

However, since the conventional method of blocking the interlayer noise by installing the cushioning material and installing the lightweight foamed concrete as described above has a limitation in blocking the low frequency band (63 Hz, 125 Hz) of the noise caused by the noise caused by the children, Discoloration is frequently caused by interlayer noise between the upper and lower layers.

In the Ministry of Construction and Transportation, the minimum standards for heavy impact sound blocking performance [light impact noise (noise of falling small objects) is less than 58dB, and heavy impact sound (children's noise) is less than 50dB]. In particular, the Housing Performance Classification System (Article 21-2 of the Housing Act) implemented in January 2006 provides information on performance such as heavy impact sound during the announcement of the recruitment of the resident to the consumer who wants to sell the house, And at the same time induces the builder to build the house at the performance level indicated. In other words, for the purpose of securing a pleasant residential environment, the system is being legislated to display performance in five areas including the sound environment.

Particularly, although the floor impact sound blocking performance (light impact sound and heavy impact sound) is treated as a major feature as the main performance indication item defined as the sound environmental performance item in the above system, A lightweight impact sound of 58 dB or less and a heavy impact sound of 50 dB or less can not be satisfied.

For example, with a floored bottom structure using materials such as foamed synthetic rubber, lightweight foamed concrete, and polyurethane foam, there is a limitation in blocking noise of a low frequency band to light impact sound of less than 58 dB and heavy impact sound of less than 50 dB.

Korean Registered Patent No. 10-0506986 (Announced 2005.08.09) Korean Registered Patent No. 10-1323476 (published on October 31, 2013) Korean Registered Patent No. 10-0839203 (published on Jun. 17, 2008) Korean Patent No. 10-0750890 (Announcement of August 22, 2007)

Therefore, it is a first object of the present invention to provide a viscoelastic composition for noise reduction of a building having an environmentally friendly performance, an antibacterial property, and an antifungal property, which can reduce the impact vibration generated by the floor impact source of the upper layer, .

A second object of the present invention is to provide a viscoelastic damping material composed of a viscoelastic composition for reducing the noise between adjacent building dwellings.

In order to achieve the first object of the present invention, in an embodiment of the present invention, 10 to 20 parts by weight of water, 10 to 30 parts by weight of a binder, 20 to 40 parts by weight of a first inorganic pigment, 10 to 25 parts by weight of a pigment, and 10 to 30 parts by weight of a natural antimicrobial agent.

According to another aspect of the present invention, there is provided a viscoelastic damping material comprising a viscoelastic composition for reducing interlayer noise.

The viscoelastic composition according to the present invention is excellent in vibration damping performance because of low viscoelastic composition viscosity and high storage modulus and loss coefficient.

Since the viscoelastic composition of the present invention can be certified as environmentally friendly, it can be used as a finishing material for apartment houses.

In addition, the viscoelastic composition of the present invention can be used as an antimicrobial and antifungal building finish satisfying the legal standards for antibacterial and antifungal.

In addition, the viscoelastic damping material of the present invention can reduce interlayer noise when used in apartment houses such as apartments.

Fig. 1 is a photograph showing the viscoelastic composition of the present invention by being applied onto glass wool.
2 is a photograph showing a viscoelastic composition charged into a glass container.
3 is a graph showing the results of HCHO analysis for the background concentration.
4 and 5 are graphs showing the results of HCHO analysis of the viscoelastic composition according to the present invention.
6 to 11 are test reports showing the results of volatile organic compound release test results of the viscoelastic composition according to the present invention.
12 and 13 are test reports showing the results of the antibacterial and antifungal detection experiments of the viscoelastic composition according to the present invention.

Hereinafter, referring to the accompanying drawings, a viscoelastic composition (hereinafter referred to as a 'viscoelastic composition') for reducing noise between apartment houses having an environmentally friendly performance and an antibacterial and antifungal efficiency according to preferred embodiments of the present invention and a viscoelastic Describe the damping material in detail.

The viscoelastic composition according to the present invention has a vibration attenuation characteristic for reducing radiation noise generated when a vibration occurs in an apartment house due to an impact. This property is closely related to the storage modulus and the loss factor of the viscoelastic composition for vibration damping.

The storage modulus, the loss modulus and the deformation modulus of the viscoelastic composition for vibration damping can be measured using a function of temperature, time, and period (Hz) giving a variable load. The thermal analysis technique DMA The mechanical behavior of the viscoelastic composition for vibration damping can be measured by controlling the temperature with varying time and load through mechanical analysis (DIN 53513, DIN 53440, ASTM D 4065, ASTM D 4092).

When a certain period of force is applied to the viscoelastic composition of the present invention, the viscoelastic composition generates a stress in the viscoelastic composition, so that deformation is generated according to the stress, and the mechanical elasticity is affected by the stress, Lt; / RTI >

That is, a phase difference is generated according to a periodically changing stress (usually sinusoidal stress) due to a time delay due to the viscoelastic property of the material. This causes a phase shift between the applied stress and expansion. The dynamic modulus measured in consideration of this phase difference is G '(storage modulus) and G' (loss modulus) ).

Here, G 'is the reaction of the viscoelastic composition for vibration damping, which is a direct result of the DMA measurement and occurs with periodic stress, which corresponds to the reversible elasticity of the viscoelastic composition for vibration damping. And the imaginary physical property G "is the loss elastic modulus, which is a phase shift reaction up to 90 ° and corresponds to the mechanical energy that is irreversibly lost due to the conversion into heat.

Also, the tan delta of the phase shift is a loss factor, which is used to measure the amplitude damping behavior of the material.

Particularly, the vibration characteristic of the floor structure in the apartment house has a characteristic of causing resonance to be greatly caused by the use of the buffer material using the floated floor. The viscoelastic damping material of the present invention has the characteristic that the shear deformation of each layer, It has a great effect in reducing the noise source such as a heavy impact sound that exhibits a large noise characteristic at low frequencies (63 Hz, 125 Hz).

That is, when the viscoelastic damping material composed of the viscoelastic composition of the present invention, which has a high loss factor, has little change in physical properties with respect to temperature, and has high durability, is applied to the bottom structure of the building, such as the ceiling of each layer, do.

Specifically, the viscoelastic composition according to the present invention comprises 10 to 20 parts by weight of water, 10 to 30 parts by weight of a binder, 20 to 40 parts by weight of a first inorganic pigment, 10 to 25 parts by weight of a second inorganic pigment, Parts by weight.

Hereinafter, each component will be described in more detail.

The viscoelastic composition according to the present invention comprises a binder.

As the binder, a polymer synthesis emulsion selected from the group consisting of an acrylic polymer, a silicone polymer, a urethane polymer, and an acrylic-silicone copolymer polymer may be used. When the content of the binder is less than the above range, the vibration damping property of the reinforcing beam for reducing the noise is lowered. On the other hand, if the content of the binder exceeds the above range, uniform mixing is difficult in the mixing process for preparing the composition, The workability due to the difficulty of the product shape and the increase of the energy consumption is reduced.

The viscoelastic composition according to the present invention comprises a first inorganic pigment.

Wherein the first inorganic pigment comprises 15 to 25% by weight of a porous particulate, 20 to 30% by weight of soda feldspar, 20 to 30% by weight of refractory clay, 15 to 25% by weight of tourmaline, 5 to 15% by weight of tourmaline, To 15% by weight.

The porous particles constituting the first inorganic pigment are prepared by processing each component into fine particles to increase the surface area of the porous particles and to mix and use the particles. When such a porous particulate material is used in an amount of less than 15% by weight, the specific functional content per unit area of the coating film is lowered, so that the weather resistance, which is the physical property of the first inorganic pigment, is lowered and the function of reducing the vibration of the structure is lowered. On the contrary, when the porous particulate material is used in an amount exceeding 25% by weight, the durability of the viscoelastic damping material may be deteriorated.

Specifically, the porous particulate material may be at least one selected from the group consisting of diatomaceous earth, clay, loess, tea clay, alopen, peat, silicon dioxide, calcium oxide, calcium hydroxide, calcium carbonate, char, activated carbon, bentonite, vermiculite, And macrocement may be selected and used.

The diatomaceous earth is a main constituent of natural mineral clay, and is composed of porous fine particles, and has excellent function of reducing formaldehyde which is a cause of sick house syndrome. In particular, in Japan, it has been certified as a building material that reduces pollution caused by volatile organic compounds (VOCs) in indoor air.

The clay, loess, and tea clay are porous fine particles, which are natural minerals having excellent humidity control.

The sepiolite and zeolite are superior to mere diatomaceous earth walls and other products for odor removal and mitigation.

Allopen is a major component of natural minerals clay of volcanic ash, which is composed of fine, porous particles and has the advantage of excellent formaldehyde abatement function, which is the cause of sick house syndrome. And allopen is porous fine particles, and it is made of ash which has excellent humidity control function as main material, and it has moisture absorbing ability and moisture absorbing ability which is 4 to 5 times of diatomaceous earth and 15 times of humidity wall paper. Allopen also provides the ability to release moisture when the humidity is high, and to release moisture when the humidity is low. Therefore, it helps to maintain optimal humidity (50% ~ 60%) of living space, and it can help prevent allergy and atopic disease through inhibition of germs reproduction. On the other hand, Alopen is superior to diatomaceous earth walls and other products in removing or alleviating the alkaline smell of ammonia, trimethylamine, etc., which are the main components of odor, and acidic odor components such as hydrogen sulfide and methylmercaptan.

The above-mentioned powder, silicon dioxide, calcium oxide, calcium hydroxide, calcium carbonate, charcoal, activated carbon, bentonite, vermiculite and pozzolan can be mixed with an organic binder or an inorganic binder.

Due to the hydration of the microcement, the microcement constitutes a rigid strength by mixing with water, and can be formed into various shapes by hydration. Micro cement is a particulate cement which is developed to be suitable for inorganic ground fillers and various repair or reinforcement materials. It is widely used as ground filler and repair reinforcing material, which require uniform grain size as well as roughness, high strength and high durability, .

Since the microcement is a fine powder, the microcement is rapidly activated and its early strength is excellent. Since a compact matrix is formed, the microcement has an excellent strength development rate, a good particle size and a small maximum particle size, And has excellent durability.

If the content of the soda feldspar constituting the first inorganic pigment is less than 20% by weight, the stain resistance and adhesion may be reduced. If the content of the soda feldspar exceeds 30% by weight, contamination resistance may be deteriorated.

The refractory clay constituting the first inorganic pigment is a clay having a refractory component for improving flame retardancy, unlike the above-mentioned clay clay. If the refractory clay is used in an amount less than 20% by weight, the fire resistance is deteriorated. If the refractory clay is used in an amount exceeding 30% by weight, stain resistance may be deteriorated.

The stones constituting the first inorganic pigment function so that the viscoelastic damping material forms a constant thickness. If the stover is used in an amount less than 15% by weight, the optimal thickness of the viscoelastic damping material can not be exhibited. If the stover is used in an amount exceeding 25% by weight, durability of the viscoelastic damping material tends to be poor.

If the amounts of tourmaline and black talc constituting the first inorganic pigment are less than 5 wt%, the dew condensation preventing performance of the viscoelastic damping material deteriorates. If the amount of each of them exceeds 15% by weight, the stain resistance of the viscoelastic damping material may deteriorate.

The viscoelastic composition according to the present invention comprises a second inorganic pigment.

The second inorganic pigment includes a porous particulate and refractory clay.

The porous particulate constituting the second inorganic pigment may be at least one selected from the group consisting of diatomaceous earth, clay, loess, tea clay, alopen, peat, silicon dioxide, calcium oxide, calcium hydroxide, calcium carbonate, charcoal, activated carbon, bentonite, vermiculite, Zeolite, pozzolan, and macrocement, and comprises 70 to 80% by weight based on 100% by weight of the second inorganic pigment.

If the amount of the porous polymeric material used is less than 70% by weight, the vibration damping characteristic, which is a functional property of the present invention, deteriorates. If the amount is more than 80% by weight, the shrinkage force of the viscoelastic damping material increases.

The refractory clay constituting the second inorganic pigment comprises 20 to 30% by weight based on 100% by weight of the second inorganic pigment. If the amount of the refractory clay is less than 20 wt%, the refractory performance is deteriorated. If the refractory clay is used in an amount exceeding 30 wt%, the stain resistance may be deteriorated.

The viscoelastic composition according to the present invention comprises a natural antimicrobial agent.

The natural antimicrobial agent may include Ag-intercalated Mica, silicates in which clay particles are dispersed, or a mixture thereof.

More specifically, the natural antimicrobial agent may comprise 5 to 15 parts by weight of mica containing silver and 5 to 15 parts by weight of silicate in which the clay particles are dispersed.

The mica containing silver was reacted by adding a mica to an aqueous solution of AgNO ₃ and stirring the mixture with a magnet rod at 60 ° C for 5 hours, filtering the dispersed mica particles using a filter paper, And washing the filtered solid material at a pH in the range of 6.5 to 7.5 for 24 hours at 100 ° C. Drying process, and milling the silver-containing mica particles (Ag-intercalated Mica) to a predetermined size (300 mesh).

In addition, silicates sprayed with clay particles can be produced through a melt process.

On the other hand, a viscoelastic damping material which can be directly used in a structure using the viscoelastic composition of the present invention will be described.

The viscoelastic damping material is formed into a plate shape through a viscoelastic composition so as to have a thickness of 1 to 20 mm according to the size of the inner space of a common house, and its length and width are not particularly limited.

The viscoelastic damping material of the present invention can be produced by extruding the viscoelastic composition into an extrusion molding machine at a predetermined thickness using a T-die, A method in which the viscoelastic composition is inserted between the rollers, and a method in which the viscoelastic composition is compressed and then molded, or a composite molding method in which the viscoelastic composition is put in an extrusion molding machine, extruded through a tie die, But is not limited to.

This viscoelastic damping material has a loss factor of 1.2 to 2.0 and a loss factor of more than 2 times that of the rubber loss factor of 0.1 to 1. Compared to concrete (0.02 to 0.06) and wood (0.005 to 0.01) Since it has an excellent loss coefficient, it has excellent damping performance in terms of noise reduction through vibration reduction.

In particular, the large energy and wavelength at low frequencies (63 Hz, 125 Hz) exhibit unpleasant and loud noise characteristics. The viscoelastic damping material according to the present invention exhibits characteristics for reducing impact noise at low frequencies, It has vibration damping characteristics and durability even in the change, so that it has an excellent noise reduction effect even in the long term.

Hereinafter, specific examples and experimental examples of the present invention will be described in more detail. It should be understood, however, that the embodiments and examples are for the purpose of promoting understanding of the specific examples of the invention described above, and the scope of rights and the like should not be construed thereby.

Preparation of the First Inorganic Pigment

2 kg of alopenes, 2.5 kg of soda feldspar, 2.5 kg of refractory clay, 2 kg of persimmon, 0.5 kg of tourmaline and 0.5 kg of black talc were mixed to prepare a first inorganic pigment.

Preparation of Second Inorganic Pigment

4 kg of diatomaceous earth, 3.5 kg of alopen and 2.5 kg of refractory clay were mixed to prepare a second inorganic pigment.

[Example 1]

1.5 kg of water, 2 kg of binder [acrylic emulsion], 3 kg of the above-mentioned first inorganic pigment, 2 kg of the above-mentioned second inorganic pigment, 0.75 kg of mica containing silver, and 0.75 kg of silicate in which clay particles were dispersed were mixed A viscoelastic composition (SBDC-VIC-1) was prepared.

[Example 2]

A viscoelastic composition was prepared in the same manner as in Example 1 except that 1.25 kg of mica containing silver was substituted for 0.75 kg of mica containing silver and 1.25 kg of silicate in which clay particles were dispersed instead of 0.75 kg of silicate in which clay particles were dispersed, SBDC-VIC-2).

[Experimental Example 1]

The viscoelastic composition prepared in Example 1 was mixed with water at a mass ratio of 1: 1.5 (viscoelastic composition 1, water 1.5) to water, and coated on a glass slide as shown in Fig. 1 to prepare a sample 1, .

The viscoelastic composition prepared in Example 2 was mixed with water at a mass ratio of 1: 1.5 (viscoelastic composition 1, water 1.5) to water, and then coated on a glass slide to prepare Sample 2, and then introduced into the container.

Next, experiments were carried out to confirm the release of HCHO (formaldehyde) and TVOC (Total Volatile Organic Compounds) during the environmental evaluation of the viscoelastic damping material using the container. In this case, the container used in the experiment was a glass container as shown in FIG. 2 in order to minimize the reactivity or absorbency with the sample, and the inlet portion was closed to prevent contact with air.

In the case of HCHO (formaldehyde) measurement, the inlet of the test vessel was sealed with parafilm and analyzed by GC (Gas Chromatography) through DS-6200 (Dainam Instrument, Korea). More specifically, a part of the container inlet was sealed with a parafilm so that the syringe needle could be injected into the glass container into which the samples 1 and 2 were respectively inserted. Next, the collecting conditions were divided into two stages, that is, before drying and after drying, collecting 1 ml of the gas sample using a syringe, collecting the collected sample three times with the air pump, and replacing the parafilm. Then, the collected sample gas was introduced into the GC inlet (GC oven temperature 50 ° C, inlet temperature 20 ° C) while taking care not to cause peaks other than the measurement sample, . These experiments were conducted in the order of background concentration and sample 1 and sample 2.

In the case of TVOC (Total Volatile Organic Compounds) measurement, a hole with a diameter of 4.5 cm was placed at the entrance and the sensor [Graywolf TG501] was inserted and analyzed by sealing. More specifically, the inlet of the glass container into which the samples 1 and 2 were respectively put was sealed. Then, the TVOC measurement sensor (Graywolf TG501) was installed completely into the hole of the container at the entrance thereof. Next, the collection conditions were measured before and after drying using a TVOC measurement sensor (Graywolf TG501). At this time, the measurement interval of the change amount was set to 30 seconds, the experimental environment of the constant temperature and humidity was maintained, and the container was cleaned several times with the air pump every time it was used. These experiments were conducted in the order of background concentration and sample 1 and sample 2.

The results of these experiments are shown in Tables 1 to 3 and Figs. 3 to 11.

Referring to [Table 1], [Table 2] and 3 to 11, HCHO was not expected to be detected because the viscoelastic composition of the present invention had no addition of HCHO in the production process. However, And the viscoelastic composition was applied immediately after the application of the viscoelastic composition. As a result, HCHO (formalehyde) was not detected.

In addition, the release test on the viscoelastic composition according to the present invention revealed that the TVOC was released in a trace amount immediately after application of the viscoelastic composition until complete curing.

According to the experimental results of the batch release, it is expected that the TVOC will not be detected when the continuous release test is performed. Therefore, when the viscoelastic composition of the present invention is used in the construction site, It was thought that the risk could be minimized.

Concretely, in the viscoelastic composition blended with Sample 1, TVOC was released at about 5 ppb per minute immediately after application, and the viscoelastic composition blended with Sample 2 was released at about 10 ppb per minute immediately after application of TVOC. This release of TVOC exhibits a decreasing function as the viscoelastic composition dries. This means that as the viscoelastic composition of the present invention slowly becomes harder, the release of TVOC is sustained. The slow curing of the viscoelastic composition includes the application thickness of the damping material, .

Further, as a result of the release test for the viscoelastic composition of the present invention, when the viscoelastic composition dried, almost no TVOC was released.

Specifically, the viscoelastic composition blended with Sample 1 was released at about 0.3 ppb per minute after drying, and the viscoelastic composition blended with Sample 2 was released at about -0.2 ppb per minute after drying.

When the temperature rises, TVOC emission from the damping material is activated. When the temperature is high as in the summer, try to provide dedicated equipment for ventilation. If the temperature is high, or if a large amount of damping material is applied, If emissions are expected, measures should be taken such as creating an environment that allows the damping material to work after it is solidified.

[Experimental Example 2]

(Test method: JIS Z 2801: 2012) and anti-fungal test (test method: ASTM (Test Method: Test Method: Test Method: G 21: 2013). The results are shown in Fig. 12 and Fig.

12 and 13, the viscoelastic composition according to the present invention was found to provide sufficient antibacterial and antifungal properties.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that it is possible.

Claims (7)

10 to 20 parts by weight of water;
10 to 30 parts by weight of a binder;
20 to 40 parts by weight of the first inorganic pigment;
10 to 25 parts by weight of a second inorganic pigment; And
And 10 to 30 parts by weight of a natural antimicrobial agent. The method of claim 1, wherein the natural antimicrobial agent is
Wherein the silicate is a silicate in which clay particles are dispersed, or a mixture thereof. The method of claim 1, wherein the natural antimicrobial agent is
5 to 15 parts by weight of mica containing silver and 5 to 15 parts by weight of silicate in which clay particles are dispersed. The method according to claim 1, wherein the first inorganic pigment is
At least one selected from the group consisting of diatomaceous earth, clay, loess, tea clay, alopen, peat, silicon dioxide, calcium oxide, calcium hydroxide, calcium carbonate, charcoal, activated carbon, bentonite, vermiculite, sepiolite, zeolite, pozzolan and macrocement 15 to 25 parts by weight of a porous particulate material;
20 to 30 parts by weight of feldspar;
20 to 30 parts by weight of refractory clay;
15 to 25 parts by weight of stones;
5 to 15 parts by weight of tourmaline; And
And 5-15 parts by weight of talc; and talc. The method according to claim 1, wherein the second inorganic pigment is
At least one selected from the group consisting of diatomaceous earth, clay, loess, tea clay, alopen, peat, silicon dioxide, calcium oxide, calcium hydroxide, calcium carbonate, charcoal, activated carbon, bentonite, vermiculite, sepiolite, zeolite, pozzolan and macrocement 70 to 80 parts by weight of a porous particulate material; And
And 20 to 30 parts by weight of refractory clay. The method according to claim 1, wherein the binder
Wherein the polymer is a polymer synthesis emulsion selected from the group consisting of an acrylic polymer, a silicone polymer, a urethane polymer, and an acrylic-silicone copolymer polymer. A vibration damping material comprising a viscoelastic composition for reducing noise between layers of a building according to claim 1.

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